Patents by Inventor Takeshi Ueno
Takeshi Ueno has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 10027378Abstract: According to one embodiment, a power reception device includes: a power receiver that wirelessly receives power from a power transmission device; a power storage that stores the power received by the power receiver; and a signal transmitter configured to transmit a detection signal, the signal transmitter being independent of a power system operating with power fed from the power storage.Type: GrantFiled: September 15, 2016Date of Patent: July 17, 2018Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Toshiyuki Umeda, Hideo Kasami, Takeshi Ueno
-
Patent number: 9997998Abstract: An electronic circuit according to one embodiment of the present invention includes a first logic circuit, a second logic circuit, first and second capacitors, and a connection circuit. The first logic circuit has a first output terminal from which a first output signal based on a first input signal is output. The second logic circuit outputs a second output signal obtained by inversion of the first output signal is output in a steady state. The first and second capacitors each have one terminal at a first voltage. The connection circuit connects one of the first output terminal and the second output terminal to the first capacitor, and the other to the second capacitor. The connection circuit interchanges connection destinations of the first capacitor and the second capacitor in accordance with a received first connection control signal.Type: GrantFiled: February 28, 2017Date of Patent: June 12, 2018Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Taichi Ogawa, Takeshi Ueno, Tetsuro Itakura, Osamu Watanabe, Takayuki Miyazaki, Yosuke Toyama
-
Publication number: 20180145518Abstract: According to one embodiment, a power supply device includes a voltage conversion circuit configured to convert a voltage of power generated by a power generation element; a plurality of power storage elements connected in parallel with respective load circuits; a switch circuit configured to switch an electrical connection between the voltage conversion circuit and each of the plurality of power storage elements; and a control circuit configured to measure voltages of the plurality of power storage elements and to control the switch circuit based on the measured voltages.Type: ApplicationFiled: September 18, 2017Publication date: May 24, 2018Inventors: Kohei ONIZUKA, Takeshi UENO
-
Publication number: 20180083530Abstract: According to one embodiment, a power supply circuit includes: a first capacitor configured to accumulate an electric charge corresponding to an input voltage; an n-number of second capacitors configured to be connected in parallel to the first capacitor, n being an integer equal to or larger than 1); an n-number of switches configured to be respectively connected in series to the n-number of second capacitors; a DC-DC converter configured to step down the input voltage; and a control circuit configured to perform control to sequentially turn on the switches each time the input voltage reaches a first threshold voltage.Type: ApplicationFiled: February 8, 2017Publication date: March 22, 2018Applicant: KABUSHIKI KAISHA TOSHIBAInventor: Takeshi UENO
-
Patent number: 9917516Abstract: A DC-DC converter including an input, an output, a conversion circuit, and a switch control circuit. The input inputs input voltage. The output outputs output voltage. The conversion circuit a plurality of semiconductor switches, and converts the input voltage to the output voltage by switching operation of one or more semiconductor switches of the plurality of semiconductor switches. The switch control circuit selects one or more semiconductor switches performing the switching operation from the plurality of semiconductor switches based on the input voltage and a predetermined lookup table, and controls the switching operation of the one or more semiconductor switches.Type: GrantFiled: August 31, 2016Date of Patent: March 13, 2018Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Taichi Ogawa, Takeshi Ueno, Tetsuro Itakura, Osamu Watanabe, Takayuki Miyazaki
-
Patent number: 9912235Abstract: A boost converter includes an input, an output, a startup circuit, a first switch, a comparator circuit, a switching circuit, a control circuit, a converter circuit, and a switch control circuit. The startup circuit boosts an input voltage up to a first output voltage. The comparator circuit outputs a first signal corresponding to the difference between the output voltage and a first reference voltage. The switching circuit outputs a second voltage based on the first signal. The control circuit outputs a second signal corresponding to the difference between the output voltage and a second reference voltage. The converter circuit boosts the input voltage based on the second signal, and outputs the output voltage. The switch control circuit generates a third signal based on the second signal, and outputs the third signal to the first switch.Type: GrantFiled: September 6, 2016Date of Patent: March 6, 2018Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Taichi Ogawa, Takeshi Ueno, Tetsuro Itakura, Osamu Watanabe, Takayuki Miyazaki
-
Publication number: 20180054115Abstract: An electronic circuit according to one embodiment of the present invention includes a first logic circuit, a second logic circuit, first and second capacitors, and a connection circuit. The first logic circuit has a first output terminal from which a first output signal based on a first input signal is output. The second logic circuit outputs a second output signal obtained by inversion of the first output signal is output in a steady state. The first and second capacitors each have one terminal at a first voltage. The connection circuit connects one of the first output terminal and the second output terminal to the first capacitor, and the other to the second capacitor. The connection circuit interchanges connection destinations of the first capacitor and the second capacitor in accordance with a received first connection control signal.Type: ApplicationFiled: February 28, 2017Publication date: February 22, 2018Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Taichi OGAWA, Takeshi Ueno, Tetsuro Itakura, Osamu Watanabe, Takayuki Miyazaki, Yosuke Toyama
-
Publication number: 20180006561Abstract: According to one embodiment, a DC-DC converter, includes: an inductor configured to be supplied with an input voltage; a plurality of rectifiers connected in parallel to the inductor; a plurality of p-MOS transistors connected in series to the respective rectifiers; a switch configured to connect an output side of the inductor to a reference potential; and a control circuit configured to control the p-MOS transistors and the switch. The control circuit performs control to supply a voltage to turn on a first p-MOS transistor selected from among the p-MOS transistors to a gate terminal of the first p-MOS transistor, and to supply a voltage depending on an output voltage of the first p-MOS transistor to a gate terminal of a second p-MOS transistor other than the first p-MOS transistor among the p-MOS transistors.Type: ApplicationFiled: March 2, 2017Publication date: January 4, 2018Applicant: Kabushiki Kaisha ToshibaInventors: Yosuke TOYAMA, Taichi Ogawa, Takeshi Ueno, Tetsuro Itakura, Osamu Watanabe, Takayuki Miyazaki
-
Publication number: 20170237346Abstract: A DC-DC converter as embodiments of the present invention includes an input terminal, multiple output terminals, an inductor, a first switch, a first condenser, a second switch and a switch controller. One end of the inductor is connected to the input terminal. The first switch is subjected to on-off control to change a current flowing through the inductor. The first condenser has one end connected between the inductor and a first output terminal, which is one of the multiple output terminals, and has the other end connected to a ground. The second switch is connected between the inductor and the first condenser. The switch controller controls the second switch to turn on when the first switch is turned off while a first output voltage from the first output terminal is smaller than a predetermined first threshold value.Type: ApplicationFiled: December 29, 2016Publication date: August 17, 2017Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Yosuke TOYAMA, Taichi OGAWA, Takeshi UENO, Tetsuro ITAKURA, Osamu WATANABE, Takayuki MIYAZAKI
-
Patent number: 9728975Abstract: According to some embodiments, there is provided a controller that performs communication with a plurality of power supply units each of which outputs electric power to a load. The controller includes a receiving unit, a control information generating unit and a transmitting unit. The receiving unit receives operation information from the power supply units by radio, the operation information being information on electric power output to the load from the power supply units, respectively. The control information generating unit generates control information to control the power supply units based on the operation information. The transmitting unit transmits the control information to the power supply units by radio.Type: GrantFiled: August 6, 2013Date of Patent: August 8, 2017Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Takeshi Ueno, Tetsuro Itakura, Takafumi Sakamoto, Toshihisa Nabetani
-
Publication number: 20170141818Abstract: According to one embodiment, a power reception device includes: a power receiver that wirelessly receives power from a power transmission device; a power storage that stores the power received by the power receiver; and a signal transmitter configured to transmit a detection signal, the signal transmitter being independent of a power system operating with power fed from the power storage.Type: ApplicationFiled: September 15, 2016Publication date: May 18, 2017Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Toshiyuki UMEDA, Hideo KASAMI, Takeshi UENO
-
Publication number: 20170133571Abstract: In order to make possible to perform thermoelectric generation utilizing a thermal source placed outside a housing case, according to one embodiment, an energy harvesting device is provided. The energy harvesting device includes: a housing case; and a thermoelectric generation element arranged to contact with an outer surface of the housing case.Type: ApplicationFiled: September 8, 2016Publication date: May 11, 2017Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Takeshi UENO, Toshiyuki UMEDA, Hideo KASAMI
-
Patent number: 9595863Abstract: An inverter control circuit has a quantizer configured to generate a switching signal which changes over switches of a main circuit converting a DC voltage into an AC voltage, and a filter circuit configured to generate a signal having specific transfer characteristic by using a signal correlated with an output voltage of an LC filter which smooths the AC voltage and an instruction signal corresponding to a target value of an output voltage of the main circuit, wherein the quantizer generates the switching signal by quantizing an output signal of the filter circuit.Type: GrantFiled: January 31, 2014Date of Patent: March 14, 2017Assignee: Kabushiki Kaisha ToshibaInventors: Takeshi Ueno, Tetsuro Itakura, Ikuya Aoyama
-
Publication number: 20170070138Abstract: A boost converter includes an input, an output, a startup circuit, a first switch, a comparator circuit, a switching circuit, a control circuit, a converter circuit, and a switch control circuit. The startup circuit boosts an input voltage up to a first output voltage. The comparator circuit outputs a first signal corresponding to the difference between the output voltage and a first reference voltage. The switching circuit outputs a second voltage based on the first signal. The control circuit outputs a second signal corresponding to the difference between the output voltage and a second reference voltage. The converter circuit boosts the input voltage based on the second signal, and outputs the output voltage. The switch control circuit generates a third signal based on the second signal, and outputs the third signal to the first switch.Type: ApplicationFiled: September 6, 2016Publication date: March 9, 2017Applicant: Kabushiki Kaisha ToshibaInventors: Taichi OGAWA, Takeshi Ueno, Tetsuro Itakura, Osamu Watanabe, Takayuki Miyazaki
-
Publication number: 20170070140Abstract: A DC-DC converter including an input, an output, a conversion circuit, and a switch control circuit. The input inputs input voltage. The output outputs output voltage. The conversion circuit a plurality of semiconductor switches, and converts the input voltage to the output voltage by switching operation of one or more semiconductor switches of the plurality of semiconductor switches. The switch control circuit selects one or more semiconductor switches performing the switching operation from the plurality of semiconductor switches based on the input voltage and a predetermined lookup table, and controls the switching operation of the one or more semiconductor switches.Type: ApplicationFiled: August 31, 2016Publication date: March 9, 2017Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Taichi OGAWA, Takeshi UENO, Tetsuro ITAKURA, Osamu WATANABE, Takayuki MIYAZAKI
-
Publication number: 20170033577Abstract: An electrical storage device according to an embodiment includes a power generator; a first-type capacitor that stores the electrical power generated by the power generator; second-type capacitors that are connected to the first-type capacitor in parallel; switches each of which is connected to one of the second-type capacitors; and a control circuit that controls the switches. Every time either a charging voltage or an observation voltage proportional to the charging voltage exceeds a first threshold value, the control circuit controls the switches in such a way that the i+1-th second-type capacitor (where i is an integer equal to or greater than zero) is additionally connected to the first-type capacitor in parallel.Type: ApplicationFiled: July 18, 2016Publication date: February 2, 2017Applicant: Kabushiki Kaisha ToshibaInventors: Takeshi UENO, Toshiyuki UMEDA
-
Patent number: 9559582Abstract: According to an embodiment, a switching power supply circuit includes a comparison circuit and an operation control circuit. The comparison circuit operates intermittently in response to an operation control signal. The comparison circuit compares a feedback voltage based on the output voltage with a reference voltage to generate a comparison result signal representing a result of comparison. The operation control circuit generates the operation control signal based on the clock signal and the comparison result signal. The operation control circuit generates an operation control signal synchronous with the clock signal, if the comparison result signal is at the first level.Type: GrantFiled: October 29, 2015Date of Patent: January 31, 2017Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Taichi Ogawa, Takeshi Ueno, Tetsuro Itakura, Takayuki Miyazaki
-
Publication number: 20160307458Abstract: A life style-services suggestion system includes: an obtainer that obtains, from a measuring device, resource consumption per unit time by a specific appliance in a building; a monitor that identifies, as behavior information, presence or absence of a specific behavior associated with usage of the appliance for a management period based on the consumption obtained by the obtainer for the management period; and a provider that allows a presentation device to present service information associated with the specific behavior in case the behavior information represents the absence of the specific behavior for the management period.Type: ApplicationFiled: November 20, 2014Publication date: October 20, 2016Inventors: Nobuo MATSUO, Takeshi UENO, Toshinobu KAWASAKI
-
Publication number: 20160293824Abstract: According to an embodiment, a thermoelectric generator includes a thermoelectric element and a DC to DC converter. The thermoelectric element converts heat energy into electric energy. The DC to DC converter increases an input voltage applied by the thermoelectric element. The input voltage is higher than a voltage which is half an open voltage of the thermoelectric element.Type: ApplicationFiled: March 8, 2016Publication date: October 6, 2016Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Takeshi UENO, Taichi OGAWA
-
Patent number: 9411351Abstract: According to an embodiment, a direct current to direct current (DC-to-DC) converter includes a power stage, a generating circuit, a voltage dividing circuit, a subtractor and a controller. The power stage converts an input voltage to a first output voltage. The generating circuit generates a reference voltage by selecting one of candidate voltages in accordance with a level of the first output voltage. The voltage dividing circuit divides the first output voltage to obtain a second output voltage. The subtractor calculates a differential voltage between the reference voltage and the second output voltage. The control circuit generates a control signal to control the level of the first output voltage based on the differential voltage.Type: GrantFiled: March 30, 2015Date of Patent: August 9, 2016Assignee: KABUSHIKI KAISHA TOSHIBAInventor: Takeshi Ueno